Dr. Louann Brizendine, author of The Male Brain, outlines the preliminary scientific results measuring the differences between the straight male brain and the gay male brain. She says that having "same-sex attraction" is "not some kind of a moral decision," but rather involves brain circuitry, genes, and hormones.

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Dr. Brizendine discusses her latest book, The Male Brain: A Breakthrough Understanding of How Men and Boys Think. An article about Dr. Louann Brizendine and her research in her first book The Female Brain in a July 2006 issue of Newsweek started a media frenzy that led to appearances on GMA's "20/20" and "Good Morning America," NBC's "The Today Show" and "News with Brian Williams," CNN's "American Morning," NPR's "Weekend All Things Considered," "Wait, Wait Don't Tell Me" along with national print reviews and features in USA Today, The New York Times, The New York Times Magazine, The Washington Post, The San Francisco Chronicle, O, The Oprah Magazine, Glamour, Elle, More, Discover, Health, and the coverage has not abated.

Now, Brizendine, founder of the country's first clinic to study gender differences in brain, behavior, and hormones, turns her attention to the male brain, showing how the "male reality" is fundamentally different from the females in every phase of life, from babyhood to old age. In The Male Brain: A Breakthrough Understanding of How Men and Boys Think, Brizendine overturns the stereotypes about men and boys. Impeccably researched and at the cutting edge of scientific knowledge, this is a book that every man, and especially every woman bedeviled by a man, will need to own. - Dominican University of California

Louann Brizendine, M.D. graduated from UC, Berkeley in Neurobiology, Yale University in Medicine and Harvard Medical School in Psychiatry.

She served on the faculty at Harvard Medical School from 1985-88 when she came to join the faculty at the University of California, San Francisco at the Langley Porter Psychiatric Institute. At UCSF, Dr. Brizendine pursues active clinical, teaching, writing and research activities.

In 1994, Dr. Brizendine founded the UCSF Women's Mood and Hormone Clinic at LPPI, and continues to serve as it's director.